Improvement in rail-drilling devices



STATES PATENT OFFICE.,

JOHN S. LANE, OF FALLS VILLAGE, CONNECTICUT.

IMPROVEMENT IN RAIL'DRILLINGDEViCES.`

Specification forming part of Letters Patent No. l 53,261, dated July 21, 1874; application filed June 6, 1874.

To all lwhom it may concer-a:

Be it known that I, JOHN S. LANE, of Falls Village, in the county of Litchfield and State of Connecticut, have invented a new and useful Improvement in Drill-Clamps, of which the following is a speciiication:

The invention consists in constructing the sliding head ot' a drill-clamp for railroads so that by rever-sin its position the clamp may be applied to either the head or liange of the rail.

Figure l is a side view, showing the clamp attached to the rail for drilling through the tiange of the rail, as for spiking down a broken rail, or attaching a switch, or for any other purpose. Fig. 2 is a front .View of the same. Fig. 3 represents the clamp applied to the railfor drilling {ish-plate holes, where the drill operates horizontally. Fig. 4 is a cross-section ot' Fig. 3, on thelines :vx and yy.

Similar letters of reference indicate corresponding parts.

A is the rail to be drilled. B is the stock of the clamp. C is the reversible sliding head. D is the feed-screw. E represents the ratchet-drill.77

In Fig. l the clamp is seen applied to the rail for operating the drill vertically, for drilling through the bed-flange. In this case the hooks F F of the head C clutch the under side of the tread of the rail, while the head itselt rests on the top of the rail. G is a shoulder on the end ofthe stock, which hooks under the other side of the tread, and the head is held to the stock by means of the grooves H H of the head and the langes I I of the stock, as seen in Fig. 4. rIhe flanges I Iterminate at thepoint J, so that the head may be detached from the stock and be turned round, or reversed, to bring the shoulder K claim as new, and desire to secure by Letters Patent- The described combination with vstock B, having shoulders G and iianges I I, of the sliding reversible head C, having ways H H, hooks F F, and shoulder K, to form a clamp applica-ble in the manner specied.

JOHN s. LANE.v

Iitnesses C. A. DEAN, M. A. BROWN. 

